Exercise balls for guinea pigs are a huge NO. Piggies have short legs and fragile spines, so even the biggest ball would never do. Guinea pigs prefer flat ground anyway, and interacting with each other which they can't do in seperate balls.

Save money by making your own colorful homemade puffy paint! 1 cup of flour 3 teaspoons of baking soda 1 teaspoon of salt about cup of water food coloring (I used gel food coloring, but you can use liquid food coloring, too)